package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.entity.UserInfo;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.model.enums.LeaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private RedisTemplate<String, String> redisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;

    /**
     * 获取图形验证码
     * @return
     */
    @Override
    public CaptchaVo getCaptcha() {
        //创建验证码对象
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        //设置验证码类型
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        //获取验证码正确的值，并转为小写
        String code = specCaptcha.text().toLowerCase();
        //获取验证码正确的键
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        //获取验证码图片
        String image = specCaptcha.toBase64();
        //将正确的验证码存入Redis数据库中，设置失效时间
        redisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        //返回验证码图片和正确的键
        return new CaptchaVo(image, key);
    }

    /**
     * 登录:登录校验
     * @param loginVo
     * @return
     */
    @Override
    public String login(LoginVo loginVo) {
        //1.判断是否存在验证码
        if (!StringUtils.hasText(loginVo.getCaptchaCode())){
            //验证码不存在
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //2.判断验证码是否正确
        String code = redisTemplate.opsForValue().get(loginVo.getCaptchaKey()).toLowerCase();
        if (code == null){
            //判断令牌是否过期了
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        boolean flag = !code.equals(loginVo.getCaptchaCode().toLowerCase());
        if (flag){
            //判断验证码错误
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //3.判断用户是否存在
        LambdaQueryWrapper<SystemUser> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserMapper.selectOne(wrapper);
        if (systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //4.判断用户是否注销
        if (systemUser.getStatus().equals(BaseStatus.DISABLE)){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //5.判断用户和密码是否正确
        String string = DigestUtils.md5Hex(loginVo.getPassword());
        String password = systemUser.getPassword();
        boolean flag1 = !systemUser.getPassword().equals(string);
        if (flag1){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //6.返回Token
        return JwtUtil.createToken(systemUser.getId(),systemUser.getName());
    }
}
